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Q1. | A stepper motor is essentially |

A. | a synchronous motor [Correct Answer] |

B. | induction motor [Wrong Answer] |

C. | dc motor [Wrong Answer] |

D. | either (b) or (c) [Wrong Answer] |

View Answer
Explanation:-
Answer : ADiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ If

*e*= 110 sin (ω

*t*+ p/3) and

*i*= 5 sin (ω

*t*- p/3), the impedance of the circuit is

22 Ω

16 Ω

30.8 Ω

11 Ω

⇒ Narrow band FM signal can be represented as

A cos (2p

*f*) - β

_{c}t*A*sin (2p

*f*) sin (2p

_{c}t*f*)

_{m}tA cos (2p

*f*) - β

_{m}t*A*sin (2p

*f*) sin (2p

_{c}t*f*)

_{m}tA cos (2p

*f*) + β

_{c}t*A*sin (2p

*f*) sin (2p

_{c}t*f*)

_{m}tA cos (2p

*f*) + β

_{m}t*A*sin (2p

*f*) sin (2p

_{m}t*f*)

_{c}t⇒

**Assertion (A):** ECL gate has very high speed of operation.

**Reason (R):** Transistors in ECL do not go into saturation region.

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is true, R is false

A is false, R is true

⇒ In a computer the data transfer between hard disk and CPU is nearly the same as that between diskette and CPU.

TRUE

FALSE

⇒ A network N is dual of network N if

both of them have same mesh equation

both of them have same node equation

mesh equation of one are the node equations of the other

KCL and KVL equations are the same

⇒ In the circuit of figure the d

will conduct as the whole cycle

will conduct in the positive half cycle

will not conduct

will conduct from 30° to 150° in the positive half cycle

⇒ The question below consists of a pair of related words followed by four pairs of words. Select the pair that best expresses the relation in the original p

fallow : land

unaware : sleeper

wit : jester

renovated : house

⇒ If B, H and M denote flux density, field intensity and magnetisation, B = μ

_{0}(H + M).

TRUE

FALSE

⇒ Photoconductive devices uses

metallic conductors

good quality insulators

semiconductors

either (a) or (c)

⇒ A capacitor having capacitance C is raised to voltage V. The energy stored will be

CV

^{2}

V

^{2}/C

0.5 V

^{2}C

0.5 C

^{2}V

⇒ An audio signal (say from 50 Hz to 10000 Hz) is frequency translated by a carrier having a frequency of 10

^{6}Hz. The values of initial (without frequency translation) and final (after frequency translation) fractional change in frequency from one band edge to the other are

200 and 1.01

200 and 10.01

200 and 100.1

200 and 200

⇒ Assuming accumulator contain A 64 and the carry is set (1). What will register A and carry (CY) contain after ORA A?

A 6 H, 1

A 6 H, 0

00 H, 0

00 H, 1

⇒ When a source is delivering maximum power to a load through a network, the ratio of power delivered to the source power

may be 50% or less than 50%

is 50%

may be 50% or more than 50%

may be 50% or more less than 50%

⇒ The phase angle curve of G(

*j*ω) H(

*j*ω) can be drawn

by adding the phase angle curves of individual factors

by subtracting the phase angle curves of individual factors

by multiplying the phase angle curves of individual factors

by dividing the phase angle curves of individual factors

⇒ Circuit switching, Message switching and Packet Switching Network belong to which of the following systems?

Computer communication system

Electromechanical communication system

PBX system

EPBX system

⇒ In figure the collector to emitter breakdown voltage of the transistor (βV

_{CEO}) shoul

more than V

_{CC}

more than 0.5 V

_{CC}

more than V

_{CC}+ E

more than 2 V

_{CC}

⇒

**Assertion (A):** Megger is used to check insulation resistance of cables.

**Reason (R):** Insulation resistance of cables is very high.

Both A and R are true and R is correct explanation of A

Both A and R are true but R is not correct explanation of A

A is true R is false

A is false R is true

⇒ Which quantity controls the effectiveness of LED in emitting light?

Applied voltage

Current

Extent of doping

Temperature

⇒ The damping ratio of a pair of complex poles when expressed in terms of angle θ measured from

*j*ω axis equal to

sin θ

cos θ

tan θ

cot θ

⇒ An ac sinusoidal wave has an rms value of 10 V. The peak to peak value is

10 V

0 V

14.14 V

28.28 V

⇒ The resistivity of ferrites is

very much lower than that of the ferromagnetic metals

slightly lower than that of the ferromagnetic materials

slightly higher than that of the ferromagnetic metals

very much higher than that of the ferromagnetic metals

⇒ For a type 1 system and unit parabolic input, the steady state error is

0

∞

1

1/K

_{v}⇒ A 5000 W signal is attenuated by - 196 dB. The resultant signal strength is

1.26 x 10

^{6}W

1.26 x 10

^{-2}W

1.26 x 10

^{-8}W

1.26 x 10

^{-16}W

⇒ In ionosphere incidence angle is 60°. The maximum usable frequency

*f*is equal to

_{m}2

*f*

_{c}*f*

_{c}0.5

*f*

_{c}3

*f*

_{c}⇒ A germanium diode has a reverse saturation current of 30 μA at 125°C and forward current of 1

*m*A at a forward potential of 0.8 V and the reverse potential is 0.6 V What are its dynamic forward and reverse resistance at this temperature.

10.7 Ω, 70

*k*Ω

34 Ω, 20

*k*Ω

80 Ω, 20

*k*Ω

800 Ω, 40

*k*Ω

⇒ A semiconductor diode is biased in forward direction and carrying current I. The current due to holes in

*p*material is

I

0

less than I

0.5

⇒ A Karnaugh map with 4 variables has

2 cells

4 cells

8 cells

16 cells

⇒

**Assertion (A):** McMurray Bredford half bridge inverter uses complementary commutation

**Reason (R):** Three phase inverter can have two modes of operation.

Both A and R are correct and R is correct explanation of A

Both A and R correct but R is not correct explanation of A

A is correct but R is wrong

A is wrong but R is correct

⇒ Consider a situation where number of minterms with even number of 0's are same as number of minterms with odd number of 1's. Then minterms with even number of 0's and minterms with odd number of 1's are __________ to each other then number of variables is __________ .

equivalent, even

complement, odd

complement, even

none of these

⇒ If a = 0.995, I

_{E}= 10 mA, I

_{CO}= 0.5 mA, then I

_{CEO}will be

100 μA

25 μA

10.1 μA

10.5 μA